Doped AB_2 Hubbard Chain: Spiral, Nagaoka and RVB States, Phase Separation and Luttinger Liquid Behavior

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dc.creatorMontenegro-Filho, R. R.
dc.creatorCoutinho-Filho, M. D.
dc.date2008-02-26
dc.date.accessioned2026-07-07T09:23:22Z
dc.date.available2026-07-07T09:23:22Z
dc.descriptionWe present an extensive numerical study of the Hubbard model on the doped AB$_2$ chain, both in the weak coupling and the infinite-U limit. Due to the special unit cell topology, this system displays a rich variety of phases as function of hole doping ($δ$) away from half-filling. Near half-filling, spiral states develop in the weak coupling regime, while Nagaoka itinerant ferromagnetism is observed in the infinite-U limit. For higher doping the system phase-separates before reaching a Mott insulating phase of short-range RVB states at $δ=1/3$. Moreover, for $δ>1/3$ we observe a crossover, which anticipates the Luttinger liquid behavior for $δ> 2/3$.
dc.description11 pages, 13 figures
dc.identifierhttps://arxiv.org/abs/0802.3880
dc.identifierhttp://arxiv.org/abs/0802.3880
dc.identifierPhysical Review B 74, 125117 (2006)
dc.identifierdoi:10.1103/PhysRevB.74.125117
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/155707
dc.subjectStrongly Correlated Electrons
dc.titleDoped AB_2 Hubbard Chain: Spiral, Nagaoka and RVB States, Phase Separation and Luttinger Liquid Behavior
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